Brush



J. MORRISON, JR.

BRUSH.

APPLICATION FILED DEC. 18, 1920.

Patented Mar. 7, 1922.

JOHN MORRISQN, JR, OF GL'ENS FALLS, NEXV YORK.

Bnusnt.

Specification of Letters Patent.

Patented Mar. *7, 1922.

Application filed'lDeccmber 18, .1920. Serial No. 431,541.

To all whom 1'15 may concern Be it-knownthat 1, JOHN Moumson, J12, acitizen of the United States, residing in Glens Falls, in the county of\Varren and State of New York, have invented certain new and usefulImprovements in Brushes, of which the following is a full, clear, and

description.

My invention relates to brushes, and more particularly to brushes ofvarious types used, mostly by hand, for polishing shoes. brushingclothes, grooming horses, removing crumbs from tables, brushing thenails, etc.

By my invention I seek to accomplish a number of distinct objects, amongwhich are the following:

I. To render the brush strong, light and durable.

IT. To increase the ease and facility which with the brush may bemanutactured.

'III. To render the brush capable of withstanding the destructiveeffects of hot and cold water.

IV. To so construct the brush as to diminish its liability to split.swell, crack, or become miter-logged.

V. To give the brush such form and construction as to prevent it fromrattling or chattering when placed in contact with other articles andsubjected to shocks and jars.

VI. To give the brush such form and construction as to enable thebristle tufts to be held firmly in position at all times and under allconditions.

VII. To give the brush such torm and construction that in itsmanufacture there may be utilized a maximum of waste materials, and thatcertain materials may be used in the "form of relatively small pieces.

VrI'H. To improve generally the efiiciency' of the brush. 7

Reference is made to the accompanying drawing tor-111mg a part of thisspec1fication, and in which like characters oi referof sections madepret'erably though not nec-' essarily of resilient material, such ascork,

used in the construction of my brushes.

Fig. 3 is a fragmentary plan of a portion of the unfinished brush back,showing how the bristle tufts are held under pressure by the sections.

Fig. t is a section on the line 4.4t oi Fig. 3, looking in the directionindicated by the arrow.

Generally speaking, the back of my brush is made up of a number ofdistinct sections.

These are made preferablyof cork or other resilient material, but ifdesired they may be made ofzsiutable woods 01" varmus"kinds.

or even of aluminum: Thebristle tuftsare held in position partly by glueor cement, and partly by pressure between the tufts and the sections.

A number of the sections are shown ate, 5, 6. and are provided withshallow notches '7, 8, 9, 10, the curvature of each notch being suchthat the form of the notch is approximately semi-cylindrical if thesections are made of metal or other rigid material, or

drical by pressure of the tufts. as hereinafter described, in theeventoi the sections being made of resilient material such as cork. Itbeing understood that I do not limit myself to the use of any specificmaterial tor the sections, 1 will for the sake of simplicity ofdescription consider that the sections shown are made of cork. Thenotches 7, 8. 9, 10 canbe out very rapidly and easily, and thereforecheaply, by teedi ng the sections across a table through which cuttersor saws. properly shaped and pro portioned for the purpose, protrude toa sutlicient distance.

The bristle tufts are shown at 11, and are each provided with a butt 12.These butts extend into holes 10. each hole being formed by a pair ofthe notches 7, 8. 9, 10,

and being substantially cylindrical in form in the completed brush.

The several sections in the finished brush are secured together by glue,cementor other appropriate adhesive.

A slab or plate 14, made of lightand strong material, such ascork, isglued upon the top of the sections. It the work be done neatly andskillfully no seam is visible between the member 14 and the sections, orbetween the sections. I designate-the member 14: as a cap plate.

In practice, the bristles are formed into the bristle tufts and theseare held in a die. Cement, glue or other appropriate adhesive is appliedto the butts of the bristle tufts, which protrude from the die, The

may be rendered substantially semi-cylindegree of hardness, the sectionsare placed in between the rowsof bristle tufts, so that adhesive becomeswholly or partially hard the butt of each bristle tuft fits into a pairof the notches 7, 8. 9, 10. Pressure is then applied to the sections, sothat each bristle tuft is forced into the notches, thus to a slightextent altering the shape thereof, as

may be seen by comparing; Figures 2 and 3. Each notch thus acqulres,under the passive pressure of'the bristle butt, asubsta-ntially 1cylindrical form. This done and the abutthe seams between the sections.

ting surfaces of the sections being held to gether by the adheslve asabove ClGSClllOQCl each bristle butt must remain at all times underpressure. It also follows that the material of each section ismaintained constantly under compression at the points where the materialis in contact with the bristle butt. 7

Owing to the saving of time in cutting the notches instead of boringround holes, there is considerable economy in making the brush of theconstruction above described.

The capping plate 14 increases the mechanical strength of the brush backas .a whole, and has a tenuency to prevent the entrance of water intocertainportions oil The capping plate also improves the generalappearance of the brush back.

My improved'brush, made as above described, is exceedingly light andstrong, and will stand considerable abuse. It may used in hot water andin cold water for long periods of time without swelling. cracking orbecoming water-logged. I have found in practice that the glue in theseams retains its tenacity and is not readily dissolved out or softenedby the action of the water, either cold or hot. A brush of this kind maystand months of rough usage without showing signs of deterioration. Itdoes not split at theseams, and it resists the entrance of water. Thebristle tufts do not pull out of the brush back. and the individ ualbristles do not pull out of the'butts of the bristle tufts.

, If a brush of this kind be carried upon a train, say in a suit-case,and there placed 1 ,aosyzes vided with notches, anda plurality ofbristlc tufts, each having a butt which extends partly into a notch ofone section and partly into a notch of a different section, saidsections being held togetherby an adhesive substance.

2. In. a brush the combinationofa num ber of separate sections each madeof resilientmaterial and provided with notches, the notches of onesection being severally disposed adjacent the respective notches of adififerent section, tufts of bristles so ar-- ranged so that each tuftextends partly into a notch 01": one section and partly into a notch ofa different section, said sections being held together under pressurmsothat each bristle tuft,'by its passive pressure againt the adj acentsections. slightly distorts the adjacent material of said sections andthus slightly changes the form of said notches.

3. In a brush the combination of a number of sections each having theform of a flat bar and provided with notches, the notches of one sectionmating the notches of a dif ferent section, a plurality of bristle tuftseach extending partly into a notch of one section and partly into anotch of a differentsection, andan adhesive for holding said sectionstogether. v

41-. In a brush the combination of a number oi sections made oi cork andprovided with 'notches, the notches of one section mating:

the notches ot a dl'liiorent section, said sec' compressed to anappreciable GIfItGllty so as to hold said butts under pressure.

JOHN nonmsonn.

